#!/bin/sh
#
# This script (along with the .travis.yml file) is used by Travis CI to
# build Bro and run the tests.
#
# This script can also be used outside of Travis (the "all" build step is
# especially convenient in this case).  Note that if you use this script
# outside of Travis then you will need to fetch the private tests manually
# (if you don't, then the private tests will be skipped).

usage() {
    echo "usage: $0 CMD DISTRO"
    echo "  CMD is a build step:"
    echo "    install: install prereqs"
    echo "    build: build bro"
    echo "    run: run the tests"
    echo "    all: do all of the above"
    echo "  DISTRO is a Linux distro, 'travis' to run without docker, or 'coverity' to run a coverity scan"
}

if [ $# -ne 2 ]; then
    usage
    exit 1
fi

step=$1
distro=$2

case $step in
    install) ;;
    build) ;;
    run) ;;
    all) ;;
    *) echo "Error: unknown build step: $step"; usage; exit 1 ;;
esac


# Install the coverity tools.
install_coverity() {
    rm -rf coverity_tool.tgz coverity-tools cov-analysis*

    echo "Downloading coverity tools..."
    wget -nv https://scan.coverity.com/download/cxx/linux64 --post-data "token=${COV_TOKEN}&project=Bro" -O coverity_tool.tgz
    tar xzf coverity_tool.tgz
    rm coverity_tool.tgz
    mv cov-analysis* coverity-tools
}


# Build Bro with the coverity tools.
build_coverity() {
    # Cleanup any previous build (this is really only necessary if running this
    # outside of Travis).
    make distclean > /dev/null

    ./configure --prefix=`pwd`/build/root --enable-debug --disable-perftools --disable-broker-tests --disable-python --disable-broctl

    export PATH=`pwd`/coverity-tools/bin:$PATH
    cd build
    cov-build --dir cov-int make -j 4
    cd ..
}


# Create a tar file and send it to coverity.
run_coverity() {
    EMAIL=bro-commits-internal@bro.org
    FILE=myproject.tgz
    VER=`cat VERSION`
    DESC=`git rev-parse HEAD`

    cd build
    echo "Creating tar file and sending to coverity..."
    tar czf ${FILE} cov-int
    curl --form token=${COV_TOKEN} --form email=${EMAIL} --form file=@${FILE} --form "version=${VER}" --form "description=${DESC}" https://scan.coverity.com/builds?project=Bro
}


# Create a docker container, and install all packages needed to build Bro.
install_in_docker() {
    case $distro in
        centos_7)
        distro_cmds="yum -y install cmake make gcc gcc-c++ flex bison libpcap-devel openssl-devel git openssl which"
        ;;
        debian_9)
        distro_cmds="apt-get update; apt-get -y install cmake make gcc g++ flex bison python libpcap-dev libssl-dev zlib1g-dev libkrb5-dev git sqlite3 curl bsdmainutils"
        ;;
        fedora_28)
        distro_cmds="yum -y install cmake make gcc gcc-c++ flex bison libpcap-devel openssl-devel git sqlite findutils which; ln -s /usr/bin/python3 /usr/local/bin/python"
        ;;
        ubuntu_16.04)
        distro_cmds="apt-get update; apt-get -y install cmake make gcc g++ flex bison python libpcap-dev libssl-dev zlib1g-dev libkrb5-dev git sqlite3 curl bsdmainutils"
        ;;
        ubuntu_18.04)
        distro_cmds="apt-get update; apt-get -y install cmake make gcc g++ flex bison python3 libpcap-dev libssl-dev zlib1g-dev libkrb5-dev git sqlite3 curl bsdmainutils; ln -s /usr/bin/python3 /usr/local/bin/python"
        ;;
        *)
        echo "Error: distro ${distro} is not recognized by this script"
        exit 1
        ;;
    esac

    docker_image=`echo $distro | tr '_' ':'`
    docker run --name brotest -id -v "`pwd`:/bro" -w /bro ${docker_image} sh
    docker exec brotest sh -c "${distro_cmds}"
}


# Build bro in a docker container.
build_in_docker() {
    docker exec brotest sh testing/scripts/travis-job build travis
}


# Run Bro tests in a docker container.
run_in_docker() {
    prepare_env
    docker exec -t -e TRAVIS -e TRAVIS_PULL_REQUEST -e trav_key -e trav_iv brotest sh testing/scripts/travis-job run travis
}


# Build Bro.
build() {
    # Cleanup any previous build (this is really only necessary if running this
    # outside of Travis).
    make distclean > /dev/null

    # Skip building broker tests, python bindings, and broctl, as these are
    # not needed by the bro tests.
    ./configure --build-type=Release --disable-broker-tests --disable-python --disable-broctl && make -j 2
}


# Rename the encrypted environment variables to avoid having the hash value
# hard-coded multiple times in this script.
prepare_env() {
    if [ -z "$trav_key" ]; then
        # This hash value is found by logging into the Travis CI website,
        # and looking at the settings in the bro repo (look in the
        # "Environment Variables" section).
        hash=6a6fe747ff7b
        eval "trav_key=\$encrypted_${hash}_key"
        eval "trav_iv=\$encrypted_${hash}_iv"
        # Export so they are visible in docker containers.
        export trav_key
        export trav_iv
    fi
}


# Get the private tests.
get_private_tests() {
    prepare_env

    if [ "${TRAVIS}" != "true" ]; then
        # When not running in the Travis environment, just skip trying to get
        # the private tests.
        echo "Note: skipping private tests (to run them, do a git clone of the private testing repo in the 'testing/external' directory before running this script)."
    elif [ -n "$trav_key" ] && [ -n "$trav_iv" ]; then
        curl https://www.bro.org/static/travis-ci/travis_key.enc -o travis_key.enc
        openssl aes-256-cbc -K $trav_key -iv $trav_iv -in travis_key.enc -out travis_key -d
        chmod 600 travis_key
        mkdir -p ~/.ssh
        mv travis_key ~/.ssh/id_rsa
        echo "git.bro.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmlu+EaJfPKTVqoEUzb5JBEdvNiFxO2wm7Vl61dGBl57avakFl8YnRujbA2yxlpC2xnEKD5y++hXxtxRLefyCM=" >> ~/.ssh/known_hosts
        git clone ssh://git@git.bro.org/bro-testing-private
        rm ~/.ssh/id_rsa
    elif [ -n "${TRAVIS_PULL_REQUEST}" ] && [ "${TRAVIS_PULL_REQUEST}" != "false" ]; then
        # For pull request builds, the private key is not available, so skip
        # the private tests to avoid failing.
        echo "Note: skipping private tests because encrypted env. variables are not available in pull request builds."
    else
        echo "Error: cannot get private tests because encrypted env. variables are not defined."
        exit 1
    fi
}


# Run Bro tests.
run() {
    echo
    echo "Running unit tests ##################################################"
    echo
    cd testing/btest

    set +e
    # Must specify a value for "-j" option, otherwise Travis uses a huge value.
    ../../aux/btest/btest -j 4 -d
    ret=$?
    set -e

    echo
    echo "Getting external tests ##############################################"
    echo
    cd ../external

    if [ ! -d bro-testing ]; then
        make init
    fi

    if [ -d bro-testing ]; then
        commit=`cat commit-hash.bro-testing`
        echo "Checking out $commit"
        ( cd bro-testing && git checkout -q $commit )
    fi

    echo

    if [ ! -d bro-testing-private ]; then
        get_private_tests
    fi

    if [ -d bro-testing-private ]; then
        commit=`cat commit-hash.bro-testing-private`
        echo "Checking out $commit"
        ( cd bro-testing-private && git checkout -q $commit )
    fi

    echo
    echo "Running external tests ##############################################"
    echo
    make || showdiag

    # If we get here, then external tests were successful.
    exit $ret
}

# Show failed tests (not skipped tests) from diag.log when a test fails.
showdiag() {
    f=bro-testing/diag.log

    grep -qs '... failed$' $f && \
      echo && \
      echo "Output of failed external tests #####################################" && \
      echo && \
      grep -v "... not available, skipped" $f

    exit 1
}

# Remove the docker container.
remove_container() {
    echo "Removing the docker container..."
    docker rm -f brotest > /dev/null
}


if [ ! -f testing/scripts/travis-job ]; then
    echo "Error: must change directory to root of bro source tree before running this script."
    exit 1
fi

set -e

if [ "${TRAVIS_EVENT_TYPE}" = "cron" ]; then
    # This is a Travis CI cron job, so check the job number.

    # Extract second component of the job number.
    if [ -z "${TRAVIS_JOB_NUMBER}" ]; then
        echo "Error: TRAVIS_JOB_NUMBER is not defined (it should be defined by Travis CI)"
        exit 1
    fi
    job=`echo ${TRAVIS_JOB_NUMBER} | cut -d . -f 2`

    # If this isn't the first job in a Travis CI build, then just output a
    # message and exit (this is not an error).
    if [ "$job" != "1" ]; then
        echo "Coverity scan is performed only in the first job of this build"
        exit 0
    fi
fi


if [ "${TRAVIS_EVENT_TYPE}" = "cron" ] || [ "$distro" = "coverity" ]; then
    # Run coverity scan when this script is run from a Travis cron job, or
    # if the user specifies the "coverity" distro.

    # Check if the project token is available (this is a secret value and
    # should not be hard-coded in this script).  This value can be found by
    # logging into the coverity scan web site and looking in the project
    # settings.
    if [ -z "${COV_TOKEN}" ]; then
        echo "Error: COV_TOKEN is not defined (should be defined in environment variables section of Travis settings for this repo)"
        exit 1
    fi

    # The "build" and "run" steps are split up into separate steps because the
    # build outputs thousands of lines (which are conveniently collapsed into
    # a single line when viewing the "Job log" on the Travis CI web site).
    if [ "$step" = "install" ]; then
        install_coverity
    elif [ "$step" = "build" ]; then
        build_coverity
    elif [ "$step" = "run" ]; then
        run_coverity
    elif [ "$step" = "all" ]; then
        install_coverity
        build_coverity
        run_coverity
    fi
elif [ "$distro" = "travis" ]; then
    # Build bro and run tests.

    # The "build" and "run" steps are split up into separate steps because the
    # build outputs thousands of lines (which are conveniently collapsed into
    # a single line when viewing the "Job log" on the Travis CI web site).
    if [ "$step" = "build" ]; then
        build
    elif [ "$step" = "run" ]; then
        run
    elif [ "$step" = "all" ]; then
        build
        run
    fi
else
    # Build bro and run tests in a docker container.

    if [ "$step" = "install" ]; then
        install_in_docker
    elif [ "$step" = "build" ]; then
        build_in_docker
    elif [ "$step" = "run" ]; then
        run_in_docker
    elif [ "$step" = "all" ]; then
        install_in_docker
        build_in_docker
        run_in_docker
        # If all tests pass, then remove the docker container.
        remove_container
    fi
fi
